Question about blindness and mind...?

You need ot go and see a doctor. The likelihood is that this is the after effects of migraine but even if it is that needs to be properly diagnosed by a doctor who needs to help you manage the condition. Not all doctors are equally helpful about migraine but you need to find one who is. Migraines are not bad headaches - there are management strategies and also other conditions can mimic them. Its a question for the doctor not the optician though.